Below Grade Waterproofing

South Coast Specialty Systems delivers customized below grade waterproofing solutions.
Our unique Southern California climate and soil demands expertise when it comes to preventing moisture intrusion and proper drainage. Our highly-skilled technicians can install and maintain below grade waterproofing projects of any kind.  Our experts know exactly the right solution for soil walls, lagging walls and concrete free standing walls. Waterproofing membrane systems used under foundations create a completely enveloped structure free of damaging moisture. Topical applications for leak remediation, maintenance and repairs are also available.


  • Parking Structures
  • Subterranean Parking Structures
  • Foundation Walls
  • Between Slab, Under Slab, including submerged conditions
  • Footing Drainage
  • Site Retaining Walls
  • Planter Areas
  • Green Roofs


Our Below Grade Waterproofing Systems consist of:

  • Variety of Rolled, Sprayed, Urethane and Rubber Coatings
  • Sheet Membranes
  • Drainage Boards
  • French Drain Systems
  • Chemical Grout Injection
  • Bentonite
  • Paraseal
  • Voltex